How should you manage multiple simultaneous 900 codes?

• A. Treat all signals with equal priority and handle in order of receipt.
• B. Prioritize based on severity, assign roles, and use discipline to avoid overlaps.
• C. Let supervisors decide after each transmission.
• D. Use back-channel for all.

Answer: (B)

When several 900 codes appear at once, the priority is to triage by threat level, then assign clear roles so everyone knows what to do and there’s no stepping on each other’s actions. Start by quickly judging which events are most dangerous or time‑sensitive and which resources they require. Then designate an incident commander to oversee the overall scene, assign sector or unit leads to manage specific areas, assign perimeter or containment duties, and appoint a communications liaison to keep information flowing without flooding a single channel. This organized approach keeps the operation focused, prevents duplicative efforts, and preserves radio discipline so instructions are understood and actions don’t conflict.

Treating every signal as equal and handling them strictly in order of receipt ignores urgency and can waste precious time on less critical calls. Letting supervisors decide after each transmission creates delays in rapid‑response situations where on‑scene decision making is essential. Relying on back-channel communication for everything fragments situational awareness and can leave units without the most current, unified information.